Photographic camera.



0. BORNMANN.

PHOTOGRAPHIG CAMERA.

APPLICATION FILED JAN. 12, 1912.

Patented June 11, 1912.

f 3 L fi' 5mm ntoz OLUMDIA PLANOORAPH CO4. WASHINGTON, D. c:

UNITED STATES PATENT CARL BORNMANN, OF BINGHAMTON, NEW YORK, AESIGNOB TOANSCO CGMPAYY, OF

BINGHAMTON, NEW YORK.

IPHOTGGRAPHIC CAMERA.

Application filed January 12, 1912.

To all whom it may concern;

Be it known that I, CARL BORNMANN, a

citizen of the United States, and a resident of the city of Binghamt'on,county of Brooine, State of New York, have invented certain new anduseful Improvements in Photographic Cameras, of which the following is afull, clear, and exact description.

It is the object of this invention to provide simple, inexpensive andquickly operated devices whereby the lens and coacting parts may beraised and lowered, as the operator may prefer, for more perfectattainment of the desired exposures.

I illustrate the invention as applied to a folding camera, but obviouslyit may be applied to cameras of other constructions.

In the drawings hereof I illustrate only such parts as are necessary orconvenient for a full understanding of the invention.

In the drawings, Figure 1 illustrates an elevation of the front of acamera, with the front board lowered and showing an elevation of theinvention; Fig. 2 illustrates a sidewise elevation of a part of themechanism shown in Fig. 1; Fig. 3 illustrates a horizontal. sectionalview through the sliding lens frame on about the line 3-3 of Fig. 1.

Referring to the drawings, 1 represents the camera body, 2 the frontboard, 3 the sliding base for the lens frame, 4, a, slideway bars uponwhich the base 3 moves and 5, 5, are braces for the front board.

The parts above referred to are or may be of any preferred construction.

6, 6, are two uprights supported upon a suitable crossbar 7, and havinggrooves out in them respectively, within which the lateral edges of thebase plate 8 which sup ports the lens mechanism slide vertically.

9 is'a lever preferably curved as shown, which is pivoted at 10 to oneof the uprights 6. It is provided with a slot 11 within which works apin or screw 12 fas tened in the plate 8. This lever is resilient andits spring action tends always to move it away from the plate 8, so thata tooth 13 made on the lever will engage in the detents of a rack bar 14fastened by screws 15, or otherwise, to the upright 6 opposite that towhich the lever is pivoted.

Specification of Letters Patent.

Patented June 11, 1912.

Serial No. ems-11.

The rack bar incloses the resilient lever and therefore controls itsspring action.

16 is a thumb piece for ease of manipulation or backward pressing of thefree end of the lever 9.

17 is a metallic casing which incloses the shutter mechanism. 18 is thelens or cap therefor 19 is a lever whereby the shutter mechanism ismanipulated.

20 is a finder which may beneficially be connected to and moved with thesupporting plate 8.

The operation is as follows: The parts will be in their normal position,that is to say, the lens will be in the focal center of the camera, whenthe lever 9 is in the position shown in Fig. 1, engaging with the rack14: at the place indicated by the letter C in that figure and the partswill maintain this position during all ordinary exposures, but shouldthe operator desire to alter the relation of the parts, he may quickly,accurately and smoothly shift the lens upwardly or downwardly by simplypressing upon the thumb piece 16, thus removing the tooth 13 of thelever 9 from the detent in the rack 14. in which it previously wasengaged and then swinging the free end of the lever up or down, asdesired, and permit the tooth 13 to enter such other detent in the rack14. as may suit his purposes. During this movement by reason of theengagement of the pin or screw 12 in the slot 11 of the lever 9, thesupporting plate 8 carrying the lens and shutter mechanism and thefinder, if the finder is supported upon it, will be moved upwardly ordownwardly as the case may be, the pin or screw 12 sliding to a greateror less extent through the slot 11.

It will be obvious to those who are familiar with this art thatmodifications may be made in the details of construction withoutdeparting from the essentials of the invention. I therefore do not limitmyself to such details.

I claim:

1. The combination of a vertically movable lens supporting frame,supporting and guiding devices therefor, a lever pivoted at one end toone of the last-named devices, means at the other end of the leversupported by the opposite guiding device for holding the lever inpredetermined positions, and means connecting the vertically movablelens frame with the lever.

2. The combination of a vertically movable lenssupporting frame,supporting and guiding devices therefor, a resilient lever pivoted atone end to one of said guiding devices, a rack at the other end of thelever supported by the opposite guiding device and which with its saidsupport incloses the lever, and whereby the latter is held inpredetermined positions, and means connecting the vertically movablelens frame with the lever.

3. The combination of a vertically mov able lens supporting frame,uprights for supporting and guiding said frame located at opposite sidesthereof, a lever pivoted at one end to one of the uprights, means uponthe other upright, engageable with the free end of the lever to hold itin predetermined positions, and means connecting the vertically movablelens frame with the lever.

41. The combination of a vertically movable lens supporting frame,uprights for supporting and guiding said frame located at opposite sidesthereof, a resilient lever pivoted at one end to one of the uprights, arack on the opposite upright, which incloses the lever and with theseveral teeth of which the lever is adapted to engage, and meansconnecting the vertically movablelens frame with the lever.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

CARL BORNMANN.

Witnesses Gno. V. ToPLIrr,

H. P. MOXON.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

